Do we have any information on nVidia 'ShadowPlay'? I've been really interested in this since I heard about it, but details seem to be sketchy, and I'm reading conflicting information as I wander around the webs.

One of my big questions is whether this will be available on th 6xx series? Or if it will only be available on 7xx cards? I'm also curious if the promised '5%' performance hit looks like a reality for this. And finally, what's the compression like on the video?